It happened around 8:45 a.m. at the store in the 7300 block of Olive. The suspect made a small purchase and then showed a handgun and demanded money.
He got away with a small amount of cash. The suspect is described as a white male in his mid 40s with a slim build. He was wearing black pants, a long sleeve gray shirt and a black Blackhawks hat.
Anyone with information should contact the University City Police Department at 314-725-2211 ext 8010 or CrimeStoppers at 866-371-TIPS.